Knowledge Base

How to block Denial of Service attacks using Intrusion Prevention.


This article explains how to configure IPS (Intrusion Prevention System) to block DoS attacks.


Enable IPS under LAN and WAN: 

  • Navigate to Network | Zones.
  • Click edit on LAN and WAN enable IPS.

Enable the prevention for DOS category: 

  • Navigate to Security Services | Intrusion Prevention.
  • Enable IPS.
  • Enable Prevent all for High and Medium Priority Attacks and Detect All for High, Medium and Low Priority Attacks.
  • Select OS-Attacks under Category.
  • Click on configure and enable the Prevention.



NOTE: This will make sure that the low priority DOS attacks are also blocked even if the Prevent all for Low Priority attacks are disabled in the Global settings.